Feedeeick j



(No Model.)

P. J. vHUBBARD.

VAPOR BURNER.

No. 371,942. Pten'ted 001;. 25, 1887.

NIrEE SrArEs AIENI ERICE.'

FREDERICK J. HURRARD, or CHICAGO, ILLINoIs, AssICNoR rro THE. ADAMS a WEsrLAKE MANUFACTURING COMPANY, or SAME PLACE.

VAPOR-BURNER.

SPECIFICATION forming part of Letters Patent No. 371,942, dated October 25, 1887.

Serial No. 203,982. (No model.)

T0 all whom it may concern:

Be it known that I, FREDERICK J. HUR- BARD, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Vapor-Burners; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying draw ings, and to the letters of reference marked thereon, which form a part of this specification.

This invention has for one of its objects to provide an improved construction in vaporburners,wherein the walls of the vapor-induction tube are subjected directly to the heat of the vaporiZing-ehamber, in order to more effectively heat the air which is injected with the vapor into the burner.

In this particular the invention consists in a`vapor'burner provided with a generating' chamber immediately below the base-plate, said chamber being centrally enlarged and extended downward to form a central chambered boss, to the lower end of which the liquidsupply or stand pipe is connected,and through which the induction-pipe passes on its way to the mixing-chamber, the improvement Con sisting in the enlargement of the space immediately surrounding said inductiontubc within the generating-chamber and the consequent exposure of a larger area or surface of said ind uction-tube to the heating action of the hot vapor within said generating-chamber.

rIhe invention also relates to an improved construction in devices for packing the needle-valve of a vapor-stove, the particular nature of which improvement will hereinafter more fully appear from the following description of the drawings.

In the accompanying drawings, Figure 1 is a plan or top view of a generating-burner containing Iny improvements and having a part of the baseplate for the perforated cap broken away and the cap removed. Fig. 2 is a side elevation of the burner-base shown in Fig. l, the rear vapor'tube of Fig. 1 being cut off in the line y y. Fig. 3 is a central vertical section in the line x :v of Fig. l. Fig. 4 is a sec tion through xx of Fig. 3.

A represents the so-called base-plate of the burner, on which rests the perforated burnercap. (Shown in dotted lines of Figs. 2 and 3.)

B is a central depending tube or hollow boss or body formed on the casting ofthe base and forming a connection for the stand-pipe B', by which liquid hydrocarbon is delivered to the generating-chamber of the burner.

'C is said generating-chamber,located immediately beneath the base-plate, being an eX- tension of the interior of the boss B, which, in fact, forms part of the generating-chamber.

D is the induction-tube for the admission of vapor from the jet-valve E (together with air carried thereby) into the burnercap through the middle of the base-plate A.

F, F', and F2 are chambered or pierced projections of the burner-casting, communieating with the jet-valves, (of which two, F3 F1, are shown,) for the supply of vapor to non-generating burners for other parts of the stove.

G is a novel stuflingbox or device for packing applied to the j et-valve tube Gand stem E'.

The burner-base, as here shown, and as preferably constructed, is a single casting, comprising the base-plate A, the depending boss B, the pierced or ehambered arms supporting thejet-valve tubes, and the induction-tube D, and embracing the generatingchamber C, with its branches or duets leading to the several jetvalves. The boss B forms a central and downwardlyextending .enlargement of the generating-chamber below the base-plate, and connects at its lower end with the stand-pipe B. The induction-tube D is curved or angular in direction and enters the boss B at one side, rising through the middle thereof to the central region of the mixing chamber embraced within the perforated cap shown in dotted lines of Figs. 2 and 3. Inasmuch as lthe interior of the boss B lforms a part of 'the vapor-generating chamber and is highly heated, the ind uction-tube D, passing through said boss, as shown in the drawings, has a much greater portion of its surface or exterior eX- posed to the heat of the generating-chamber than when said chamber is of shallow depth and the induction tube passes vertically through it, this latter being a construction previously known. Said former construction IOC) has, in reality, little effect in communicating heat from the generating-chamber to the induction-tube, owing to the small extent of the su rface of said tube which is exposed directly to the action of the heated vapor, while in the construction here shownthe extent to which the surface of the induction-tube is so exposed to the heat of the vapor-generating chamber enables the latter to materially raise the temperature of the partially-mixed air and Vapor which enters said induction-tube to the mixingchamber of the burner, and to thereby better t the same for proper combustion as it emerges from the perforations of the burner-cap.

The burner shown is designed to accomplish the generation of vapor not only for its own combustion, but for the use of other burners of the stove. and to this end has the pierced branches F, F', and F2, leading to jet-"alves F3 F4, Snc., for as many non-generating burners in addition to that branch, El, which leads to the jet-valve E for the principal burner, said several branches leading from Various points on the margin of the generating-chamber C.

The improvementlin the paekingvfor the' valvestem consists in the provision of a reduced part, e, on the valve-stem E back of the screw-th`read thereon, giving shoulders at e and e, a collar, e2, niovably embracing this reduced part e and reaching across the packingspace, and a movable or follower sleeve, e3, surrounding the stem, which sleeve is forced and held in the packing-space by the head of the cap-nutgof the stuffingbox G. Thepacking c* surrounds the reduced part cof the stem and is compressed by the movable sleeve c3.

In the operation ofthe stuffing-box or mechanism thus constructed the full or considerable retreat of the needle valve or stem E brings the shoulder eagainst the collarc,which,

being supported by the packing, backed up by the sleeve or follower e, forms astop which prevents the needlevalve from being withdrawn.

The shoulder e5 on the stem is not essential to this action and may be omitted, provided the diameter of the part e is sufficient to give strength throughout the whole length of the stem, which, obviously, only requires that the screw-threaded part of the stem be made enough larger to afford a sufcient shoulder at e.

To apply the collar e2 about the reduced part e of the valve-stem when both shoulders e and e5 are present, said collar will commonly be split, as shown in Fig. 4.

I claim as my inventionl. A vaponburner base having a generating-chamber beneath the base-plate, which is centrally enlarged by a downward extension thereof, forming a chambered boss connected at its lower end with the liquid-inlet pipe, and

an induction-tube for the admission of air and vapor to the mixing-chamber of' the burner, which induction-tube enters said boss laterally and passes upward through the vapor-generating space included within said boss, substantially as described, and for the purpose set forth.

2. The combination, with a stuffingbox and its cap, of a valve-stem provided with a shoulder, e', a collar, c2, back of said shoulder, and a sleeve or follower, e, substantially as described, and for the purpose set forth.

In testimony that I claim the foregoing as my invention I affix my signaturein presence of two witnesses.

FREDERICK J. HUBBARD.

Vitnesses:

M. E. DAYTON, C. CLARENCE PooLE. 

